The attitude that objects which are scientifically proven to be 3-dimensional are actually 2-dimensional or flat.
Jack: "Look at that planet, it is sooo spherical!"
John: "No, I believe you are wrong! It is obviously flat!"
Jack: "Dude, your flattitude is showing!"
by moisays April 15, 2017
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That grateful feeling when your flatulence doesn't leave a surprise in your shorts.
While stuck in traffic, Dave gave a sigh of flattitude when the fart was only a fart.
by elKeitho May 26, 2016
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